Insulation Box Having Two Boards and a Spring Disposed Between the Boards

ABSTRACT

An insulation box includes: a case body with a receiving space and an opening, and a door board for covering the opening; wherein the door board includes stacked inner and outer boards, and springs are disposed therebetween to provide buffering and tightening effects. When the opening is covered by the door board for a signal test, the inner board can be properly adjusted to completely seal up the opening of the insulation box, thereby preventing signals from being lost.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to insulation environments, and, more particularly, to an insulation box.

2. Description of Related Art

In the flourishing modem electronic industry, electronic products are developed in the trend of miniaturization with powerful features such as high performance, more functions, and high speed. All general electronic products need a specification test, i.e., electromagnetic interference test, to enable the electronic products meet the criteria of related specifications. The electronic products will be put inside an insulation environment for the testing process, and the insulation environment can be an insulation room or an insulation box.

Please refer to FIG. 1, which illustrates an insulation box 1 for a testing process according to the prior art. The insulation box 1 comprises a case body 12 with an opening 120, a door board 13 for opening/closing the opening 120, an insulation board 14 disposed on the door board 13, a latch 15 for connecting the door board 13 and the case body 12, and hinges 16. Inner walls of the case body 12 consist of insulation material, the door board 13 has a looped raised bar 130, while the case body 12 has a corresponding looped groove 121 for he raised bar 130 to wedge therein. In addition, the insulation board 14 is loosely matched with inner wall around the opening 120, and the latch 15 is a manual latch mostly made out of steel.

However, when opening the door board 13, the latch 15 must be manually operated. Consequently, the latch 15 is easily getting weary and loose after frequent usage, thereby the raised bar 130 of the door board 13 cannot wedge tightly in the groove 121 of the case body 12, and further leading to weaken the insulation effect and causing the testing signals to be let out easily through the area around the opening 120 and the latch 15.

Furthermore, each hinge 16 used in the prior insulation box 1 consists of two asymmetric side-by-side steel leaves 160 fixed to the case body 12 and the door board 13 separately, the door board 13 can be opened and closed through the work of a pivot axle 161. Since the two asymmetric steel leaves are disposed side-by-side, after frequent use for opening/closing the door board 13, the two steel leaves 160 are getting deformed and loose easily; consequently, the door board 13 cannot seal up the case body 12 well, accordingly the insulation box 1 will be poorly sealed, thereby causing signals to lose through the area around the opening 120.

Hence, it is a highly urgent technique issue in the industry how to solve the problem of “being unable to keep the door board sealing up the case body” as happened in the prior art.

SUMMARY OF THE INVENTION

In view of the drawbacks of the prior art mentioned above, it is therefore an objective of this invention to provide an insulation box, mainly improving the door board in the prior art; and no matter in what state the latch or hinges are, being capable of avoiding problem of losing signals due to poor airtightness of the insulation box.

The door board of the present invention can be closely hinged to one side of the case body for closing up the opening, also the door board consists of an inner board disposed inwardly, an outer board disposed outwardly, and springs disposed between the inner and outer boards for maintaining the elastic yaw allowance for the inner board.

The insulation box of the present invention comprises a door board that is a double-stacked board body (the inner and outer board), thus providing a double insulation effect to prevent signals from being let out.

Furthermore, the springs provide the inner board with elastic yaw allowance. Therefore, the space between the inner and outer boards has buffering and tightening effect; after the door board covers the opening, the position of the inner board can be properly adjusted to enable the inner board to seal up the opening, and thus the door board of double-stacked board body (the inner and outer boards) can seal up the insulation box efficiently; thereby avoiding problem of losing signals due to poor airtightness happened between the inner and the outer boards.

BRIEF DESCRIPTION OF DRAWINGS

The invention can be more fully understood by reading the following detailed description of the preferred embodiments, with reference made to the accompanying drawings, wherein:

FIG. 1 is a 3-D diagram showing an insulation box according to the prior art;

FIG. 2A is a 3-D diagram showing an opened insulation box according to the present invention;

FIG. 2B is an analytical 3-D diagram showing a door board of an insulation box according to the present invention;

FIG. 2C is a partial sectional diagram depicting the door board of an insulation box according to the present invention;

FIG. 3A is a 3-D diagram depicting a closed insulation box according to the present invention;

FIG. 3B is a partial close-up 3-D diagram depicting a latch of a insulation box according to the present invention; and

FIG. 3C is a 3-D diagram depicting a hinge of an insulation box according to the present invention.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The following illustrative embodiments are provided to illustrate the disclosure of the present invention; those in the art can apparently understand these and other advantages and effects after reading the disclosure of this specification. The present invention can also be performed or applied by other different embodiments. The details of the specification may be on the basis of different points and applications, and numerous modifications and variations can be devised without departing from the spirit of the present invention.

Please refer to FIGS. 2A through 2C, which are diagrams depicting an insulation box according the present invention, providing an insulation environment for accurately testing objects. In the present embodiment, the insulation environment is for insulation signals in the process of testing electronic products.

As shown in FIG. 2A, the insulation box comprises a case body 2 with an opening 20, a door board 3 for sealing up the opening 20, and an insulation board 4 disposed on the door board 3 facing the opening 20.

The case body 2 comprises a rectangular bottom board 21 and four rectangular side boards 22 vertically disposed on four sides of the bottom board 21, and thus a receiving space S is formed therewithin. The opening 20 connects the receiving space S and external environment. An insulation material is disposed on inner surface 22 a of each of the side boards 22.

The door board 3 can be closely hinged to one side of the case body 2 for closing up the opening 20. As shown in FIGS. 2B and 2C, the door board 3 comprises a rectangular outer board 31, a rectangular inner board 32 stacked on the outer board 31, four sets of connecting elements 30 for connecting the inner board 32 and the outer board 31 at the four corners, and four springs 33 disposed between the outer board 31 and the inner board 32. The springs 33 are allocated at the four corners of the door board 3, enabling the outer board 31 and the inner board 32 to keep a homogeneous distance D to each other. The design of the inner board 32 and the outer board 31 in the insulation box provides the door board 3 with a double insulation effect to prevent signals from being let out.

In an embodiment of the present invention, only one spring 33 may be disposed between the outer board 31 and the inner board 32.

The area of the outer board 31 is larger than the area of the inner board 32, and the area of the inner board 32 is larger than the area of the opening 20, thereby enabling both the outer board 31 and the inner board 32 to be capable of covering the receiving space S.

Furthermore, when the door board 3 is laid down to cover from one side of the case body 2, the outer board 31 and the inner board 32 become interlocked with the case body 2 and cover the opening 20. As shown in FIG. 2A, the outer board 31 comprises a looped raised bar 310, and the case body 2 comprises a looped groove 23 around the opening 20 for the raised bar 310 to wedge therein. The inner board 32 comprises a looped first stair 320, and the case body 2 comprises a second stair 24 around the opening 20 for the first stair 320 to wedge therein.

In addition, the connecting element 30 is a T-shaped element, namely, the traverse part thereof is fixed onto the outer board 31 while the vertical part thereof is fixed onto the inner board 32. In the present embodiment, the connecting element 30 comprises a fixing sheet 301 and a cylinder 300 that is axially disposed on the fixing sheet 301, the fixing sheet 301 is fixed to the outer board 302 via screws 302, and one end of the cylinder 300 is a cap 300 a for embedding inside the outer board 31 while the other end of the cylinder 300 is riveted to a via hole 321 of the inner board 32, thereby enabling the cylinder 300 to be exposed between the inner board 32 and the outer board 31, and maintaining a preset distance (namely, distance D) between the inner board 32 and the outer board 31. As shown in FIGS. 2B and 2C, the outer board 31 comprises a first notch 311 at each corner for fixing the fixing sheet 301 thereon and second notches 312 disposed at bottom of the first notch 311 (as shown in FIG. 2C, not penetrating the outer board 31), the second notch 312 is for disposing the cap 300 a, also the fixing sheet 301 covers the second notch 312, thereby the cap 300 a is embedded in the outer board 31.

In addition, the springs 33 are for maintaining the elastic yaw allowance for the inner board 32. When assembling the springs 33, first disposing each spring 33 in a third notch 313 of the outer board 31. Subsequently, when using the connecting element 30 to connect the inner board 32 and the outer board 31, the inner board 32 will push down the springs 33, and thus the springs 33 are allocated between the outer board 31 and the inner board 32. As shown in FIG. 2A, when the door board 3 is in an opening state, pushing the inner board 32 toward the outer board 31 direction P, and the inner board 32 will rebound by the springs 33.

The insulation board 4 is disposed on the inner board 32, and the inner board 32 is located between the insulation board 4 and the outer board 31. Also, the area of the inner board 32 is larger than the area of the insulation board 4, as shown in FIG. 2A. In the present embodiment, the insulation board 4 is loosely matched with the inner surfaces 22 a of the side boards 22 around the opening 20.

The insulation box of the present invention applies the springs 33 for the inner board 32 to perform elastic yaw, providing buffering and tightening effect between the outer board 31 and the inner board 32. After the door board 3 is laid down to cover the opening 20, the raised bar 310 of the outer board 31 wedges in the grooves 23 around the opening 20, and the springs 33 help adjusting the inner board 32 to a proper position (displacing in a direction from the outer board 31 to the opening 20, namely, from up to down). Consequently, the first stair 320 of the inner board 32 wedges in the second stair 24 of the case body 2, enabling the inner board 32 to seal up the opening 20, and avoiding the problem of losing signals caused due to poor airtightness between the outer board 31 and the inner board 32.

If the first stair 320 of the inner board 32 cannot efficiently wedge in the second stair 24 of the case body 2 due to getting worn out or other factors, a preset length of the cylinder 300 enables the inner board 32 and the outer board 31 to maintain a preset distance, and the springs 33 drive the inner board 32 to displace to a proper position for sealing up the opening 20.

Furthermore, the second notches 312 do not penetrate the outer board 31, thereby avoiding signals from escaping via the second notches 312 in the testing process.

Moreover, a distance D between the outer board 31 and the inner board 32 provides the inner board 32 with displacement in opposition to outer board 31 (as displacement direction L shown in FIG. 2C). Therefore, a depth d of the second notch 312 is greater than a height h of the cap for reserving a space for displacement.

Additionally, the cylinder 300 can also be elastic, allowing the depth of the second notch is same as the height of the cap, without needing a space for displacement.

Please refer to FIGS. 3A through 3C, the insulation box further comprises a latch 5 and hinges 6 for connecting the door board 3 and the case body 2. As shown in FIGS. 3A and 3B, the latch 5 is a pneumatic latch, which is made of durable reinforced plastics and is disposed on the outer board 31 and one of the side boards 22, and an air tube 7 is connected with an air cylinder (not shown in the FIG) for controlling a tenon 50 of the latch 5 to wedge in or separate from a mortise 51 on the case body 2, thereby enabling the door board 3 to be fixed to or released from the case body 2. As indicated by the dotted line in FIG. 3A, the tenon 50 is wedged in the mortise 51, thereby having the door board 3 fixed to the case body 2. Since the tenon 50 is controlled by pneumatic means, even after many times of use of the door board 3, the tenon 50 is not easily to worn out or get loose. Consequently, the door board 3 and the case body 2 can maintain well-sealed, thereby avoiding problem of losing signals from around the opening 20 and the latch 5 due to poor airtightness of the insulation box.

As shown in FIGS. 3A and 3C, each of the said hinges has two symmetrical side-by-side steel leaves 60 separately fixed to the side board 22 and the outer board 31, and a pivot 61 axially connecting the two steel leaves. The door board 3 is pivoted to the case body 2 through the hinges, thereby enabling the door board 3 to be operated to open or close the case body 2. Also, the symmetrical side-by-side design of the two steel leaves 60 provides benefit of maintaining the two steel leaves 60 in good shape as well as well-fixed, therefore the door board 3 and the case body 2 can keep airtight closeness, and further avoiding problem of losing signal around the opening 20 due to poor airtightness of the insulation box.

In view of the above, the insulation box of the present invention, mainly providing the double-layered door board having an inner and an outer boards, and further by applying the springs to provide the inner board with buffering and tightening effect; therefore, when using the door board to seal up the insulation box, capable of efficiently avoiding problem of losing signal due to poor airtightness of the insulation box in no matter what state the latch or hinges are.

The invention has been described using exemplary preferred embodiments. However, it is to be understood that the scope of the invention is not limited to the disclosed embodiments. On the contrary, it is intended to cover various modifications and similar arrangements. The scope of the claims, therefore, should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements. 

1. An insulation box, comprising: a case body including a receiving space and an opening toward external environment; and a door board closable and hinged to one side of the case body for closing up the opening, the door board including an outer board disposed outwardly, an inner board disposed inwardly, and one spring disposed between the inner board and the outer board for maintaining an elastic yaw allowance for the inner board.
 2. The insulation box of claim 1, wherein inner walls of the insulation box comprises an insulation material.
 3. The insulation box of claim 1, further comprising connecting elements for connecting the inner board and the outer board.
 4. The insulation box of claim 3, wherein each of the connecting elements includes a fixing sheet and a cylinder axially disposed on the fixing sheet, the fixing sheet fixed onto the outer board for enabling one end of the cylinder to be embedded in the outer board, and the other end of the cylinder to be connected to the inner board, and having the cylinder to be exposed between the inner board and the outer board, thereby keeping a preset distance between the inner board and the outer board.
 5. The insulation box of claim 4, wherein the outer board further comprises notches, one end of the cylinder is disposed inside the notch, and the fixing sheet covers the notch, thereby having the end of the cylinder to be embedded in the outer board.
 6. The insulation box of claim 5, wherein the notch has a depth greater than a height of the end of the cylinder embedded in the notch.
 7. The insulation box of claim 1, further comprising an insulation board disposed on the inner board, wherein the inner board is located between the insulation board and the outer board, and has an area greater than an area of the insulation board.
 8. The insulation box of claim 1, further comprising a latch and a mortise disposed on the outer board and the case body, respectively, for locking up and fixing the door board as in a closing state.
 9. The insulation box of claim 8, wherein the latch is a pneumatic latch.
 10. The insulation box of claim 1, further comprising hinges connecting the door board and the main box.
 11. The insulation box of claim 1, wherein the door board further comprises three springs, and the four springs are disposed at four corners of the door board, respectively. 